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If costheta=2/3 then find the value of 2secsquaretheta+2tansquaretheta-7 |
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Answer» ong>ANSWER: 0 Step-by-step explanation: GIVEN, Cosθ=2/3 Note, Cosθ=Secθ and 1+Tan²θ=Sec²θ Then, 2Sec²θ+2Tan²θ-7=2Sec²θ+2(Sec²θ-1)-7 =4Sec²θ-9=4/Cos²θ -9=4/(4/9) -9=9-9=0 HENCE, 2Sec²θ+2Tan²θ=0 |
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