hamood9654 hamood9654

04-07-2017
Mathematics

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If cos(t)=-9/10 where pi < t < 3pi/2, find the values of the following trigonometric functions.

cos(2t)=
sin(2t)=
sin(t/2)=
cos(t/2)=

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ghanami ghanami

09-07-2017

hello here is a solution :

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