SOLUTION: If tangent squar=21/20, calculate the value of 1 sin squar .

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Question 957238: If tangent squar=21/20, calculate the value of 1 sin squar .
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I think you're saying,
tan%5E2%28theta%29=21%2F20
sin%5E2%28theta%29%2Fcos%5E2%28theta%29=21%2F20
sin%5E2%28theta%29=cos%5E2%28theta%29%2821%2F20%29
.
.
.
sin%5E2%28theta%29%2Bcos%5E2%28theta%29=1
%2821%2F20%29cos%5E2%28theta%29%2Bcos%5E2%28theta%29=1
cos%5E2%28theta%29%2821%2F20%2B20%2F20%29=1
cos%5E2%28theta%29%2841%2F20%29=1
cos%5E2%28theta%29=20%2F41
So then,
sin%5E2%28theta%29=%2821%2F20%29%2820%2F41%29
sin%5E2%28theta%29=21%2F41