(1+ sinß) COD
cosa
COSO
(i) sina+sin?B=1
(11) cotß+cos B
x2
y vyz-x?
= 1
4.
If sin 17° = $. let us show that sec 17° - sin 73°
y
5. Let us show that sec2 12°
tan78°
6. ZA+ZB = 90°, let us show that 1+
tan B
7.
Let us show that cosec-22° cot68° = sin²22° + sin’68° + cot68°
tan A = sec A
18. If ZP+ ZQ = 90°, let us show that,
sin P
sinP cos Q = cos P
cos Q.
9. let us prove that cot 12° cot 38° cot 52° cot 78° cot 60°
TO. AOB is a diameter of a circle with centre O and C is any point on the cir
B, C; and 0,C let us show that
(i) tanZABC = cotZACO (ii) sin’ZBCO+ sin’ZACO=1
(iii) cosec-ZCAB-1=tan? ZABC
rove that

Students at a high school were asked about their favorite outdoor activity. the results are shown in the two-way frequency table below. fishing camping canoeing skiing total boys 36 44 13 25 118 girls 34 37 22 20 113 total 70 81 35 45 231 select all the statements that are true based on the given table. more girls chose camping as their favorite outdoor activity than boys. more girls chose canoeing as their favorite outdoor activity than those who chose skiing. more boys chose skiing as their favorite outdoor activity than girls. there were more boys surveyed than girls. twice as many students chose canoeing as their favorite outdoor activity than those who chose fishing. more students chose camping as their favorite outdoor activity than the combined number of students who chose canoeing or skiing.