if sin q is 4 upon 5 find cos q
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Answer:
3/5
Step-by-step explanation:
sin q=4/5 ----(given)
by using identity,
sin^2q+cos^2q=1
(4/5)^2+cos^2q= 1
cos^2q=1-(4/5)^2
cos^2q= 1-16/25
cos^2q=25-16/25
cos^2q= 9/25
cos q= 3/5 ------(taking square root on both sides)
cos q= 3/5
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