22) Find the values of trigonometric function of cos6=4/5; 37
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Answer:
Correct option is B)
(
cos
2
22+cos
2
68
sin
2
22+sin
2
68
+sin
2
63+cos63sin27)
={
cos
2
(90−68)+cos
2
68
sin
2
(90−68)+sin
2
68
+sin
2
63+cos63sin(90−63)}
={
sin
2
68+cos
2
68
cos
2
68+sin
2
68
+sin
2
63+cos63cos63}
=(1+sin
2
63+cos
2
63)
=1+1
=2
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