The angle θ lies in Quadrant II . sinθ=34 What is cosθ ?
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In second quadrant sin is positive and cos is negative.
sin²i=1-cos²i=0.34²
or,cos²i=1-0.34²
or,cos²i=1-0.1156
or,cos²i=0.8844
or,cosi=±0.94
Since cosi is negative in second quadrant,so positive value is neglected.
Hence cosi=-0.94
sin²i=1-cos²i=0.34²
or,cos²i=1-0.34²
or,cos²i=1-0.1156
or,cos²i=0.8844
or,cosi=±0.94
Since cosi is negative in second quadrant,so positive value is neglected.
Hence cosi=-0.94
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